The JBO Thread Ring Gauge (NoGo) is a precision inspection tool designed to verify external thread diameters on fasteners, fittings, and machined parts. It serves engineers, quality teams, machinists, and maintenance technicians across manufacturing, automotive, and aerospace sectors, helping ensure threads conform to Unified thread standards and will assemble correctly.

Built from hardened steel for lasting performance, this gauge features a trapezoidal, right-hand thread form (7e) with a Tr. 20 x 4 configuration. Its NoGo design provides a clear, quick indication of non-conforming threads, supporting reliable quality checks and consistent assembly outcomes.

• No-Go design for rapid conformance checks: Quickly identify out-of-tolerance threads to speed up inspections, reduce rework, and prevent mismatched assemblies before they reach production lines.
• Hardened steel construction for durability: Withstands daily use in busy workshops, resisting wear and maintaining accuracy across many measurement cycles.
• Precise trapezoidal Right-Hand 7e, Tr. 20 x 4 threading: Delivers repeatable external-thread diameter verification aligned with Unified standards, helping ensure parts thread correctly and assemble reliably.

By using the JBO Thread Ring Gauge (NoGo), you gain a reliable, repeatable method to verify external threads, speeding up quality-control checks, reducing downtime from threading mismatches, and supporting traceability for audits. Its robust construction and clear NoGo indication empower your team to make confident, efficient decisions, delivering consistent results in demanding production environments.